JSON Keys to be converted to lowercase programmatically.

In the following angularjs code, $scope.productsNew contains json array whose keys are not in lowercase, they are like  Id, Sku, Description I need them to be like id, sku,description

I need to change them to lowercase in angularjs, could you help me in this.

function storeController($scope,$http) {

    function onUserComplete(response) {        
        $scope.productsNew = [{ Id: 3, Sku: 'APL', Name: 'Apple', Description: 'Eat one every day to keep the doctor away!', Price: 20 }, 
              { Id: 4, Sku: 'BAN', Name: 'Banana', Description: 'These are rich in Potassium and easy to peel.', Price: 40 }];
    };
    
    function onError(reason) {
        $scope.error = "Could not fetch the Products";
    };

    $http.get("http://localhost:60128/Products-Service/Products")
    .then(onUserComplete, onError);

}

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Thanks
meetDinesh